Machine for rolling carpenters&#39; squares.



PATENTED 00129 19-07.

'11. K.. JONES. MACHINE FOR ROLLING GARPENTERSWQUARES.

APPLICATION BIL-ED: (IOTA, 1904;

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UNITED STATES PATENT OFFICE.

HORACE K. JONES, OF HARTFORD, CONNECTICUT, ASSIGNOR TO RUSSELL & ERWINMANUFACTURING COMPANY, OF NEW BRITAIN, CONNECTICUT, A CORPORATION.

MACHINE FOR ROLLING CARPENTERS SQUARES.

Specification of Letters Patent.

Patented Oct. 29, 1907.

Application filed October 4 1904:- Serial No. 227.105.

To all whom it may concern:

Be it known that I, HORACE K. JONES, a citizen of the United States,residing at Hartford, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inMachines for Rolling Carpenters Squares, of which the following is aspecification.

My invention relates to improvements .in machines for rolling carpenterssquares and the objects of my improvement are to provide means toreadily adjust the machine to vary the taper of the work rolled and toprovide a relief from an over strain of the machine.

In the accompanying drawingFigure 1 is a side elevation of the left handside of the machine with'a part of the left hand upright of the framebroken off and a part of the sub-lever in section. Fig. 2 is a plan viewof the machine. Fig. 3 is a diagram illustrating the difference in thethrow of the toggle under a given movement when in different positions.Fig. 4 is a diagram, on a greatly reduced scale illustrating the shapeof the blades and the manner of cutting them from a sheet of metalpreparatory to rolling.

A, designates the bed of the machine, having mounted thereon at one end,the frame B for the rolls and adjacent parts and at the other end, theframe C for mounting the driving shaft D and connected parts. Thisdriving shai t is shown in Fig. 2, with its outer end broken off. Theframe B has two uprights 13 and 14 within which the rolls (3 and 7 areadjustably mounted to move relatively to and from each other and to beheld in their adjusted position for giving the necessary pressure. Asshown the upper roll 7 is the one that rises and falls to make'thenecessary variation of the space between the rolls. These rolls aremounted on short shafts and are driven by the main shaft D, having asquare portion that engages a coupling at the end of the shaft for thelower roll 6, and a counter shaft 11 having a like square portion 9, andcoupling 10 that connects said shaft with the shaft of the upper roll 7,the said shaft D and counter shaft being connected by a pair of gearwheels the upper one of which 32, is shown irrFig. 2. i The upperhalf-box 12 for the upper roll extends from upright to upright of theframe so as to serve for both ends of the upper roll and to which thesaid roll is mounted so as to rise and fall with the said half-box. Atthe top of this half box, is a toggle link 15, and on this link is thetoggle-lever head 16 surmounted by another toggle link 15, and cross baror abutment 17, all of which extend'from upright to upright of theframe. Set screws 18 extend through the uprights 13 and 14 and rest onthe cross bar abutment 17 for adjusting the position of the upper rollwhen it is pushed downwardly by the toggle lever and links. A spring 19,the upper end of which is attached to the cross rod 20, and the lowerend of which is secured to the upper half box 12, has a constanttendency to lift thesaid half box and upper roll to its upper mostposition and to hold it up when not forced downwardly by the togglemechanism. The toggle lever as a whole extends from its head 16rearwardly to the cam 22, that is mounted on the cam shaft 23, at therear part of the frames B, C. This cam shaft is driven by the gear wheel24 and clutch 25, the said wheel being loosely mounted on the said shaftwhile the clutch is rigid thereon, so that the shaft is driven by thesaid wheel when the clutch is engaged therewith, but remains stationarywhile the wheel rotates when the clutch is disengaged therefrom. Thegear wheel 24 engages with and is driven by a similar gear wheel 31fixed on the driving shaft D, whereby the cam shaft and rolls movetogether. The clutch lever 27 is mounted on the bracket 26 and is thrownout of engagement with the clutch by means of the foot treadle 29 andbar 30 that connects one end of the foot treadle with one end of thesaid clutch lever. 1

In Fig. 4 the blanks to be rolled are shown as right angular blades thatcannot be passed endwise through the rolls between ordinary uprights,hence the blade space 33 is made in the front of the upright 13. Themachine thus far specifically described is the same as in my Patent No.748,870 dated Jan. 5, 1904, to which reference is made for furtherdetails if desired.

My present invention is in the nature of an improvement thereon, or animprovement on machines of the general character thereof, which machinesmay differ largely therefrom as to specific constructions. In myaforesaid patent the toggle device including the lever constitutesmechanism between the cam and the rolls for reducing the motion of thecam. My present invention relates to an adjustment of this reducingmechanism, so that a given motion of the cam, that is, one revolution,may be made to close the rolls more or less whereby the taper of theblades rolled may be varied as desired.

The body 21 of the toggle lever extends back from the toggle head asbefore, only it stops short of reaching the cam so that it may bedropped down below the highest point of the cam without being hit by thesaid cam. The proper length to engage the cam is made by the sub-lever34 that takes the place of the outer end of the toggle lever in myaforesaid patent. This sub-lever overlaps the lever body 21, and is heldin position thereon, partly by the bolt 35 and partly by the pintle 36,that forms a joint between the body of the lever and the sublever. Thesaid pintle, as shown is received in a hole drilled partly in each ofthe said a two parts. A set screw 39 in a threaded hole in the sub-leverhas its end resting on the body 21 of the toggle lever at a point nearerthe outer end of the said body than the position of the bolt 35.Provision should links a a in alinclnent.

be made to permit the sublever to move on its pintle 36 while themovement thereof is limited in one direction by the said bolt. Thisprovision as shown, is made by the slot 37, in the sub-lever throughwhich slot the bolt 35 passes. By this construction the nut 38 on thebolt 35 may be loosened and the set screw 39 screwed in to move thesub-lever on its pintle until the lever and sub-lever come to a firmbearing on the said set screw, bolt and pintle, and the'sub-lever isrigidly held substantially the same if it was one piece with the body ofthe lever, only that it is adjustable when desired and is not so strongas a solid lever, whereby the bolt will break and prevent a breakage ofmore important parts of the machine in case of accident, or an undueclogging of the rolls. In order to show how this adjustment of the leverwill change the taper of the work rolled at one revolution of the cam, Ihave shown in Fig. 3 a diagram of the lever-head and toggle links-inthree different positions. The abutment of the toggle is designated b,16 represents the lever head in the position shown in Fig. .l, with itsLowering the outer end of the lever a given distance represented by thethrow of the cam, rotates the lever head a. given fraction of arevolution, while the spring 19 lifts the said head into the positionmarked 16'. The work is now placed between the rolls and the rotation ofthe cam moves the lever to gradually force the rolls together, and givea tapering form to the blade, which taper will vary according to thedistance that the rolls move towards each other when a blade of a givenlength is being rolled therein. In the diagram Fig. 3, eturn movement fthe leverhead over the fractional part of a revolution represented by 16and 16", will force the rolls together a distance represented by thedistance between 1 and 2 If the lever is adjusted so as to start thereturn or lifting movement of the lever with the links and leverhead inthe position represented by 16 and the lever is given the same amount ofmovement as before, it will force the rolls down with the leverhead andlinks into the position represented by 16', moving them the distancerepresented by 3 and l, which is about three times as much as when thelever-head is rotated the same part of a revolution with the adjustmentfirst described, thereby greatly increasing the taper of the bladerolled by one revolution of the rolls. As in my aforesaid patent, theabutment 17 will be adjusted by the set screws 18, to bring the rollsthe desired distance from each other when the toggle links are at thelast end of their stroke. When the machine is set to bring the linksinto alinement at the last end of the stroke of the cam and togglelever, the said lever and links have thoirgreatest possible amount ofreduction, and consequently impart the least amount of taper to theblade that can be made with this particular cam. Suppose the cam leveris adjusted by dropping the outer end of the body of the cam lever tothrow the links out of alinement at the last end of their stroke, orwhen the sub-lever rests on the point of the cam so that the links havea still greater degree of inclination at the beginning of their stroke,then with the same movement of the cam and lever the reduction of themotion of thecam will be less than before and consequently the effectivestroke of the links will be greater so that a given length of bladepassing through the rollers will be rolled with a greater taper. Thisless reduction of the motion of the cam and greater throw of the linksfor forcing the rolls together is illustrated in Fig. 3 by the movementof the lower end of the lower link from 3 to 1.

It may be noted that when the two parts of the lever are firmly drawntogether by the bolt 35' as shown in Fig. 1, the set screw ispractically idle, that is the parts in that position will be heldprecisely the same Without the set screw. The set screw is useful onlyto take up the slack when the nut 38 on the bolt is loosened to let thetwo parts separate more or less. The belt 35 as shown in Fig. 1constitutes a breakable relief connection. It should also be noted thatthe cam 22 is an actuator for imparting a definite stroke to the partwhich it drives, that is, the lever 2l.3i. This lever always moves agiven distance or stroke for every revolution or stroke of thisactuator.

l t is apparent that some changes may be made from the specificconstruction. herein disclosed, and I desire the liberty of making suchchanges, in working my invention, as may fairly come within the spiritand scope of the same.

I claim as my invention.

1. The combination of a frame with the rolls mounted therein, one of thesaid rolls being movable to and from the other. a cam mounted in theframe separately from the said rolls, toggle links and a lever having ahead at one end lying between the said links and by which the lever isit'ulcrumed, the other end of the said lever being acted on by the saidcam and means for adjusting the axial position of the said head withoutchanging the throw of the lever as acted upon by the said cam.

2. The combination of rolls relatively movable to and from each otherwith a cam moving in connection with the said rolls, toggle links actingto force the said rolls together. a twopart lever for operating the saidtogg links, one part of which lever bears upon the said cam and theother part of which lies between theinner ends of the said toggle linksfor operating them, and means for adjusting the position of that part ofthe said lever that lies between the inner ends of the said links, forvarying the angles that the said links will have at both ends of theirstroke as operated through the said lever and cam.

3. In a machine for rolling tapering blades, the combination of a pairof rolls movable onetowards the other, a cam moving in unison with thesaid rolls, mechanism for forcing the said rolls together, and a leverfor operating the said mechanism, the said lever consisting of a leverbody connected with the said mechanism for forcing the rolls together. asub-lever hinged to the said body and extended to bear upon the saidcam, a bolt passing through the said body and sub-leverto limit theirseparation, and a set screw to limit their movement towards each other.

-l. In a machine for rolling tapering blades, the combination of therolls relatively movable to and from each other, mechanism for forcingthe said rolls together, a lever for actuating the said mechanismconsisting of a body portion connected with the said mechanism forforcing the rolls together and a sublever mounted thereon, an actuatoracting upon the said sub-lever, and means for adjustably connecting thesaid body portion and sub-lever together and which also serves as abreakable connection.

HORACE K. JONES.

